Sometimes the first character of the command is chopped off, making it an invalid command

[jmanian]

More specifically, instead of starting the command with bundle it starts with undle, which of course doesn't work.

I am using a custom command, if that might make a difference — I added spring:

bundle exec spring rspec --color

I haven't noticed a pattern to when this happens, so I can't reproduce it reliably. If you have any tips on how I could debug it when it does happen, I will check it out.